Chuck



Nov. 24, 1925 F. W. TRENN CHUCK Filed Aug. 5, 1922 INVENTOR. Wan/i ll/ 7.;6Z7W

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Patented Nov. 24, 1925.

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FRANK 1V. TRENN, OF 'WILLOUGHBY, OHIG, ASSIGNO-R TO THE ECONOMY ENGINEER- ING COMTRPANY, O33 WILLGUG-HB'Y, OHIO, A CUBPORATION OF OHIO.

CHUCK.

Application filed August 5, 1922.

To all el /10m it may concern:

Be it known that I, FRANK W. TnnNN, a citizen of the United States. residing at VVillo'ughhy, in the county of Lake and in the to of Ohio, have invented certain new and useful Improvements in Chucks. of which the following is a specification.

ililthough not confined thereto the chuck is specifically adapted to hold a drill or tap in a vertical spindle.

in the accompanying drawings Figure 1 is a transverse vertical section of one form my invention may take. Fig. 2 is a transverse vertical section of the same taken at right angles to the section of Fig. 1. Fig. 3 is a bottom plan view of the chuck and Fig. -:l a transverse horizontal section on the line -t---l of Fig. 2.

For purposes of illustration 1 have shown a shaft or spindle 10 which may be rotated. hy any suitable means (not shown). Lough tudinal lieys 11. enter key ways in the shaft 10. A sleeve 12 surrounds the shaft 10 and has key ways to engage the keys 11 so that the sleeve 12 has longitudinal movement on the shaft 10. A. hollow head 13 has a reduccd end extending into the sleeve 12 in which it is held against rotation hv keys 11. The head 13 has a central longitudinal here into which may project the drill or tap 15 shown in dotted lines in Fig. 1. The portion of the head 13 which projects from the sleeve 1:) is enlarged to form shoulders 16 against which the end of the sleeve 12 is seated. The projecting end of the head 13 has transverse apertures in which lit cylindrical jaws 17, the inward movement of which is limited h pins 18 projecting into recesses in the jaws 1.7. in addition to limiting the inwartil movement oi. the jaws 17 the pins 18 hold the jaws from turning or rotation in their seats. A collar 19 surrounds the lower end ot. the sleeve 12 and projects downward so as to engage the outer end of the jaws 17 and hold them in their innermost position as illustrated in full lines in Fin. 1. In this position the beveled noses of the jaws 1.? en gage the formed seats in the tap and hold it against rotation and snugly in contact with an ejector pin 20 projecting from the lower end of the shaft 10 into which the pin 20 is Serial No. 579,785.

tapped. The lower end of the collar 19 is larger in interior diameter than the seat for the jaws 17 and a beveled portion 21 connects the two faces of the collar 19.

The collar 15) may slide upward on the sleeve 12 as indicated in dotted lines in Fig. 1. Screws 22 in the sleeve 12 limit the upward movement of the collar 19. A pin 23 projecting from the shaft 10 into a longitudinal slot 2 1 in the sleeve 12 limits the sliding movement of the sleeve 12 on the shaft 10. Screws counter-sunk in the lower end of the sleeve 12 are tapped into the head 13 and hold it in the sleeve 12.

It will be seen in Fig. 2 that the collar 19 has been raised to allow the jaws 17 to re cede and release the tap 15. The sleeve 12 carrying the collar 19 and the head 13 has been raised so as to cause the ejector 20 to torce the tap out of the chuck.

In order to insert the tap the sleeve 12 may he dropped to the position shown in full lines in Fig. 1.. The collar 19 may then he raised to the position shown in dotted lines in l? 1 which will allow the jaws 17 to recede so that the tap 15 may be inserted into the head 13 to rest against the ejector 20. The collar 19 may then be lowered to the position shown in full lines in Fin. 1 and in its passage the luiveled wall 21 will force the jaws 17 against the pins 18 into contact with the tap 15 which is thus securely and rigidly held in position.

Numerous changes in detail may he made without departine from the spirit of the iu \ention.

I claim as my invention:

1. A. rotary shaft. a longitudinally movahle sleeve keyed one end of the shaft. :1 pin on the shaft engaging a slot in the sleeve to limit the loueitudiiml movement of the sleeve on the shaft. a collar on the sleeve, means on the sleeve to limit the movement ot the collar on the sleeve a hollow head extending within the sleeve and adapted to be surrounded by the collar, jaws sliding trans versely in the head, a seat in the collar holding the jaws in engagement with a drill in the head. an expanded cavity in the collar to permit the jaws to slide radially to release the drill .e'uide )ins in the head for the jaws, and an ejector projecting from the shaft into the sleeve and actuated by the relative longitudinal movement of said shaft and sleeve to engage and eject the drill.

2. A rotary shaft, a sleeve sliding longitudinally on the shaft, a collar sliding longitudinally on the sleeve, a hollow head projecting from the sleeve, j aws in the head, means on the collar to operate the jaws to hold a drill, and an ejector projecting from the 10 shaft into the sleeve and actuated by the relative longitudinal movement of said shaft and sleeve to engage and eject the drill.

FRANK lV. TRENN 

